Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '83f70fcc0260c3c57061dc06dd125dbd241a9b1acf619b7675799e08b6c8b41b' 
  AND token = 'BCoI4reYaTrqzChKcUBfhWJ4NBkqqm71zGioG3/MgEU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}